Akademik Veri Yönetim Sistemi
Research on Chemical Intermediates, cilt.47, sa.10, ss.4281-4295, 2021 (SCI-Expanded)
In the present work, a new triazine-based intermediate containing bis(2-pyridylmethyl)amine and benzothiazole units was designed and synthesized with the purpose of selective and sensitive cation detection. The related sensor candidate IV was characterized chemically and photophysically with the assistance of FTIR, UV–Vis, fluorescence, DLS, 1H- and 13C-NMR spectroscopic techniques along with HRMS data. Photophysical studies of this sensor molecule exhibited aggregation dependent emission enhancement with polarity increment that have been explained on the basis of aggregation induced emission phenomenon. Within this context, DMSO:H2O (50:50, v/v) was determined as the most appropriate solvent mixture and the chemosensor has been found to detect Zn2+ selectively in this aqueous medium by fluorescence enhancement. The detection limit of the turn-on sensor IV for Zn2+ was found to be 0.011 μmol L−1. Along with the support of HRMS data, the binding stoichiometry of IV to Zn2+ was revealed as 1:1 from the Job's plot analysis and the binding constant of IV − Zn2+ complex was calculated as 9.31 × 106 M−1 by Benesi-Hildebrand plot. Moreover, the linear response range between the values of 50–1000 μmol L−1 for Zn2+ ions was observed and selective detection of Zn2+ among other competitive metal ions including Cd2+ was provided. The newly synthesized sensor that may offer a different perspective was successfully applied to determine Zn2+ in real sample with good recovery and reproducibility.